.mainformbackground {
    height: 100%;
    width: 100%;
}

.header {
    height: 60px;
    width: 100%;
    padding: 0;
}

.footer {
    height: 20px;
    width: 100%;
    padding: 0;
}

.el-main {
    padding: 10px;
}

.main {
    height: calc(100vh - 80px);
    /* 100% viewport height minus header and footer height */
    display: grid;
    grid-template-columns: 240px 1fr;
}

.aside {
    width: 240px;
}

.details {
    background-color: aliceblue;  
}